Philips TEA6825T, TEA6823T Datasheet
INTEGRATED CIRCUITS
DATA SH EET
TEA6823T; TEA6825T
In Car Entertainment (ICE) car
radio
Preliminary specification
File under Integrated Circuits, IC01
1998 Mar 24
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
FEATURES
General
• FM mixer for conversion from FM-IF
FM-IF2= 10.7 MHz
• AM mixer for conversion from AM-IF1= 10.7 MHz to
AM-IF2= 450 kHz
• FM-IF gain stage
• Crystal oscillator providing mixer frequencies and
references for IF-count and stereo decoder
• FM quadrature demodulator with automatic centre
frequency adjustment and THD compensation
• Level, multi-path and noise detectors
• Soft mute
• Stereo noise cancelling and variable de-emphasis
• PLL stereo decoder
• Noise blanker
• AM IF-amplifier and demodulator
• I2C-bus transceiver with interface to enable direct data
transfer to radio front-end
• IF-count for AM and FM
• Reference frequency generation for PLL synthesizer.
ORDERING INFORMATION
= 72.2 MHz to
1
Stereo decoder
• Adjustment-free PLL VCO
• Pilot depending mono/stereo switching
• Analog control of mono/stereo blend
• Adjacent channel noise suppression (114 kHz)
• Pilot cancelled
• Analog control of de-emphasis
• Integrated low-pass filters for 190 kHz adjacent channel
interferences and signal delay for interference
absorption circuit.
GENERAL DESCRIPTION
The TEA6823T together with the TEA6811T and the
TEA6825T together with the TEA6810T form an AM/FM
electronic tuned car radio in a double conversion receiver
concept.
TYPE NUMBER
NAME DESCRIPTION VERSION
TEA6823T VSO56 plastic very small outline package; 56 leads SOT190-1
TEA6825T VSO56 plastic very small outline package; 56 leads; face down SOT190-2
PACKAGE
1998 Mar 24 2
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
DDA1
I
DDA1
I
19+I20
I
22+I23
V
DDA2
I
DDA2
V
DDA3
I
DDA3
V
DDD
I
DDD
SN+
-------------N
THD total harmonic distortion FM mode; ∆f=75kHz − 0.1 0.35 %
α
cs
T
amb
analog supply voltage 1 (+5 V; pin 5) note 1 4.5 5.0 5.5 V
operating range 4.75 5.0 5.25 V
analog supply current 1 (pin 5) FM mode 17 21 25 mA
AM mode 14 17 21 mA
total FM mixer output current 4.8 6.0 7.2 mA
total AM mixer output current 10 12 14 mA
analog supply voltage 2 (pin 28) note 1 7.0 8.5 10 V
operating range 8.1 8.5 8.9 V
analog supply current 2 (pin 28) FM mode 2.4 3.0 3.6 mA
analog supply voltage 3 (+8.5 V; pin 56) note 1 7.0 8.5 10 V
operating range 8.1 8.5 8.9 V
analog supply current 3 (pin 56) FM mode 19 24 28 mA
AM mode 9.5 12 15 mA
digital supply voltage 1 (+5 V; pin 52) note 1 4.5 5.0 5.5 V
operating range 4.75 5.0 5.25 V
digital supply current (pin 52) note 1 8 10 12 mA
signal plus noise-to-noise ratio FM mode;
66 75 − dB
∆f = 22.5 kHz at
pins 43 and 47
AM mode; m = 0.3 54 60 − dB
AM mode − 1.5 3 %
channel separation (adjusted) 40 −−dB
operating ambient temperature −40 − +85 °C
Note
1. IC is operating; specified parameters may deviate from limits which are valid for operating range.
1998 Mar 24 3
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1998 Mar 24 4
dbook, full pagewidth
BLOCK DIAGRAM
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
Philips Semiconductors Preliminary specification
V
CC1
10.7 MHz
SFE10.7
330 Ω
100 nF
10.7 MHz
10.7 MHz
10.7 MHz
ZS369SCS-2144AJ TR3
72.2 MHz
SDA
SCL
f
ref
22 nF
100 nF
61.5 MHz
PHILIPS
9922 521 00098
or Daiwa AT-49
V
DDD
+5 V
TOKO
7PSAG-1946D = S
10 nF
10 kΩ10 kΩ
TR5
37
35
27
24
28
29
19
20
13
56
pF
14
8
9
10
11
6
7
10 kΩ
10 kΩ
1.5 nF
AM
÷2/÷6
IF-
AMPLIFIER
FM
OSCILLATOR
REFERENCE
FREQUENCY
V
ref
33 kΩ
AMSTOP
100 kΩ
33 kΩ
68 µF
39214745254843
AFC
TEA6823T
TEA6825T
SWITCH
R
C
100
nF
R51
RDS
MPX
BUFFER
100
nF
SOFT
MUTE
MODULATION
DETECTOR
3.3 MΩ
2.2 MΩ
100 nF
10 nF
3.3 nF
tuning
mute
220 nF
HIGH
PASS
FILTER
V
int2
220 kΩ
68 pF
100 kΩ
R41
PILOT
CANCELLER
MPX-
DECODER
AND
MATRIX
mono
82 kΩ
LOW
PASS
FILTER
INTERFERENCE
1 MΩ
1.2 MΩ
PILOT
DETECTOR
PULSE
FORMER
DETECTOR
NOISE
DETECTOR
PHASE
DETECTOR
100 nF
FMSTOP
100 kΩ
R39
ADC
LEVEL
I2C-BUS
330 Ω
SDA
V
ref
100 kΩ
R40
100 nF
36
FM-LIMITER
AM-AMPLIFIER
LEVEL
DETECTOR
LEVEL
AMPLIFIER
20 kHz
BUFFER
ADC
MULTI-
PATH
TOKO
P392BC-1977Z
LEVELADJ
220 nF 220 nF
82 kΩ
38
TEMP
COMPEN-
SATION
level
L13
62 pF
4.3 kΩ
AM
DELOG
AMPLIFIER
HIGH
PASS
60 kHz
AVERAGE
DETECTOR
PEAK
DETECTOR
AVERAGE
DETECTOR
PEAK
DETECTOR
AM
CURRENT
THRESHOLD
CONTROL
V
CC
8.5 V
1 kΩ
SFP450
100
nF
34 42
332322
AM/FM
SWITCH
÷N5
IF
COUNTER
54 53 55 40 50 3 46 16 49 15 17 18 51 21 52
330 Ω
SCL
220 nF 22 nF
27 kΩ
DIGITAL
PHASE
DETECTOR
f
ref
radio mute
V
int1
radio mute
V
int1
V
SUPPLY
int2
12 kΩ
33 kΩ
V
V
ref
DDD
+5 V
VCO
LOGIC
BLOCK
33 µF
10 Ω
26
31
44
30
41
32
56
12
4
5
MGK693
100
nF
820 kΩ
100 nF
470 nF
470 nF
120 kΩ
100
nF
6.8 nF
6.8 nF
OUTRIGHT
OUTLEFT
22 µH
47 µF47 µF
47 µF
V
+5 V
V
CC
+8.5 V
+8.5 V
CCA
38 kHz19 kHz
Fig.1 Block diagram.
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
PINNING
SYMBOL PIN DESCRIPTION
QDET1 1 demodulator tank 1
QDET2 2 demodulator tank 2
TSWITCH 3 time switch input
AGND 4 analog ground
V
DDA1
5 analog supply voltage 1 (+5 V)
HFBUS1 6 HF bus 1 output;
pull-up to +5 V
HFBUS2 7 HF bus 2 output;
pull-up to +5 V
XTAL1 8 crystal oscillator 1
XTAL2 9 crystal oscillator 2
f
ref(p)
10 PLL reference frequency
output (p)
f
ref(n)
11 PLL reference frequency
output (n)
I
ref
12 reference current
FMIF1IN1 13 72 MHz FM-IF input 1
FMIF1IN2 14 72 MHz FM-IF input 2
TSDR 15 time constant for SDR
TSDS 16 time constant for SDS
V
V
SDS
SDR
17 SDS control voltage input
18 SDR control voltage input
FMIF2OUT1 19 FM mixer output 1
FMIF2OUT2 20 FM mixer output 2
V
ref
21 reference voltage output
AMIF2OUT1 22 AM mixer output 1
AMIF2OUT2 23 AM mixer output 2
FMAMDEC 24 FM/AM 10.7 MHz decoupling
PHASEDET 25 phase detector output
PILDET 26 pilot detector output
FMAM10.7 27 FM/AM 10.7 MHz input
V
DDA2
28 analog supply voltage 2
SYMBOL PIN DESCRIPTION
FMIFAMPOUT 29 FM-IF amplifier output
AFGND 30 AF ground
DEEMPHR 31 de-emphasis capacitor right
DEEMPHL 32 de-emphasis capacitor left
AMIF2IN1 33 AM-IF
AMIF2IN2 34 AM-IF
input 1
2
input 2
2
FMIN2 35 FM limiter input
DCFEED 36 DC feed FM limiter
FMIN1 37 FM limiter input
LEVELADJ 38 level adjustment input
C
AFC
39 AFC capacitor
MPBUF 40 multi-path buffer time constant
OUTLEFT 41 AF output left
FMSTOP 42 FMSTOP adjustment input
RDS/AMSTOP 43 MPX for RDS/AMSTOP
adjustment input
OUTRIGHT 44 AF output right
MPXIN 45 stereo decoder MPX input
THRES 46 threshold
MPXOUT 47 FM demodulator MPX output
AMAFOUT 48 AM demodulator AF output
V
mute/AML
49 mute voltage/AM level
LEVELUNWEIG 50 unweighted level output
IAC
V
DDD
CONTR
51 IAC control voltage
52 digital supply voltage
SDA 53 serial data input/output;
pull-up to +5 V
SCL 54 serial clock input;
pull-up to +5 V
DGND 55 digital ground
V
DDA3
56 analog supply voltage 3
(+8.5 V)
1998 Mar 24 5
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
handbook, halfpage
TSWITCH
HFBUS1
HFBUS2
FMIF1IN1
FMIF1IN2
FMIF2OUT1
FMIF2OUT2
AMIF2OUT1
AMIF2OUT2
FMAMDEC
PHASEDET
PILDET
FMAM10.7
Fig.2 Pin configuration for TEA6823T.
QDET1
QDET2
AGND
V
DDA1
XTAL1
XTAL2
f
ref(p)
f
ref(n)
I
ref
TSDR
TSDS
V
SDS
V
SDR
V
ref
V
DDA2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
TEA6823T
MHA700
56
V
DDA3
55
DGND
54
SCL
53
SDA
52
V
DDD
51
IAC
50
LEVELUNWEIG
49
V
mute/AML
48
AMAFOUT
47
MPXOUT
46
THRES
45
MPXIN
44
OUTRIGHT
43
RDS/AMSTOP
42
FMSTOP
41
OUTLEFT
40
MPBUF
39
C
AFC
38
LEVELADJ
37
FMIN1
36
DCFEED
35
FMIN2
34
AMIF2IN2
33
AMIF2IN1
32
DEEMPHL
31
DEEMPHR
30
AFGND
29
FMIFAMPOUT
CONTR
handbook, halfpage
IAC
LEVELUNWEIG
V
mute/AML
AMAFOUT
OUTRIGHT
RDS/AMSTOP
OUTLEFT
LEVELADJ
AMIF2IN2
AMIF2IN1
DEEMPHL
DEEMPHR
FMIFAMPOUT
CONTR
MPXOUT
FMSTOP
MPBUF
DCFEED
AFGND
V
DDA3
DGND
SCL
SDA
V
DDD
THRES
MPXIN
C
AFC
FMIN1
FMIN2
56
55
54
53
52
51
50
49
48
47
46
45
44
43
TEA6825T
42
41
40
39
38
37
36
35
34
33
32
31
30
29
MHA701
1
QDET1
2
QDET2
3
TSWITCH
4
AGND
5
V
DDA1
6
HFBUS1
7
HFBUS2
8
XTAL1
9
XTAL2
10
f
ref(p)
11
f
ref(n)
12
I
ref
13
FMIF1IN1
14
FMIF1IN2
15
TSDR
16
TSDS
17
V
SDS
18
V
SDR
19
FMIF2OUT1
20
FMIF2OUT2
21
V
ref
22
AMIF2OUT1
23
AMIF2OUT2
24
FMAMDEC
25
PHASEDET
26
PILDET
27
FMAM10.7
28
V
DDA2
Fig.3 Pin configuration for TEA6825T (top view).
FUNCTIONAL DESCRIPTION
Stereo decoder
By changing the value of the input resistor at pin 12 the
MPX input can be adapted to the level of the FM
demodulator output (see Fig.16).
1998 Mar 24 6
A 3rd order low-pass filter (f
= 90 kHz) at the MPX input
g
provides an extra 190 kHz ACI suppression.
An interference gate is connected at the MPX demodulator
outputs. For AM the VCO is switched off.
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
DDA1
V
DDA2
V
DDA3
V
DDD
T
stg
T
amb
V
es
Note
1. Charge device model class B: equivalent to discharging a 200 pF capacitor via a 0 Ω series resistor.
analog supply voltage 1 (pin 5) −0.3 +6.5 V
analog supply voltage 2 (pin 28) −0.3 +12 V
analog supply voltage 3 (pin 56) −0.3 +12 V
digital supply voltage (pin 52) −0.3 +6.5 V
storage temperature −55 +150 °C
operating ambient temperature −40 +85 °C
electrostatic handling note 1
pins 8 and 9 −100 +100 V
all other pins −300 +300 V
CHARACTERISTICS
V
56-4=V28-4
= 8.5 V; V
5-4=V52-55
=5V; T
amb
=25°C; f
= 1 kHz; deviation = 22.5 kHz; Rg=50Ω; V
mod
37-35
=10mV;
with de-emphasis = 50 µs; coil quality = 15; unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Currents
I
DDA1
analog supply current 1 (pin 5) FM mode 17 21 25 mA
AM mode 14 17 21 mA
I
DDA2
I
DDA3
analog supply current 2 (pin 28) FM mode 2.4 3.0 3.6 mA
analog supply current 3 (pin 56) FM mode 19 24 28 mA
AM mode 9.5 12 15 mA
I
DDD
I
19+I20
I
22+I23
digital supply current (pin 52) 8 10 12 mA
total FM mixer output current 4.8 6.0 7.2 mA
total AM mixer output current AM mode 10 12 14 mA
FM-IF path; see Fig.4
V
19-20 max(p-p)
maximum output voltage
12.0 14.0 − V
(peak-to-peak value)
I
; I
19
20
mixer bias current 2.4 3.0 3.6 mA
mixer leakage current in AM position −− 2 µA
I
19IF2/V13-14IF1
R
i
C
i
R
opt
R
o
C
o
conversion gain 1.65 1.9 2.2 mS
input resistance (pins 13 to 14) 5 7 − kΩ
input capacitance (pins 13 to 14) − 3 4.5 pF
optimum generator resistance − 1.2 − kΩ
output resistance (pins 19 to 20) 15 20 − kΩ
output capacitance (pins 19 to 4
− 12 14 pF
and pins 20 to 4)
IP3 third order intermodulation 114 124 − dBµV
1998 Mar 24 7
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Oscillator
f
osc
∆f
osc
∆f
/∆T temperature dependence of
osc
R
1
C
0
amplifier
FM-IF
2
V
27-24 max(rms)
V
29-4 max(rms)
V
29-4/V27-24
∆V
29-4/V27-24
R
i
C
i
R
o
C
o
FM-IF
limiter
2
V
o 1-2(p-p)
V
1-2/V37-35
C
i
R
o
C
o
oscillator frequency − 61.5 − MHz
oscillator frequency spread −− 250 Hz
−1
oscillator frequency
crystal type Philips
9922 521 00098
− 30 × 10−6− K
crystal motional resistance −− 70 Ω
crystal shunt capacitance −− 5pF
maximum input voltage for 1 dB
80 110 − mV
compression point (RMS value)
maximum output voltage
220 320 − mV
(RMS value)
amplifier gain RL= 330 Ω; see Fig.5 9 12 15 dB
gain temperature dependence −25 °C<T
< +85 °C − 0.1 − dB/K
amb
input resistance (pins 27 to 24) 300 330 360 Ω
input capacitance (pins 27 to 4) −− 5pF
output resistance (pin 29) 300 330 360 Ω
output capacitance (pins 29 to 4) −− 5pF
limiter output voltage
500 700 − mV
(peak-to-peak value)
limiter gain see Fig.6 − 80 − dB
input capacitance (pins 37 to 4) −− 5pF
output resistance (pins 1 to 2) −− 1.0 kΩ
output capacitance (pins 1 to 2) 10 15 20 pF
1998 Mar 24 8
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
FM demodulator
V
47-4(rms)
V
43-4(rms)
V
37-35(rms)
V
37-35(rms)
∆V
43DC
V
43FM/V43AM
V
47FM/V47AM
∆V
43-44AFCdis
/∆V
43-44AFCactive
R
o
SN+
-------------N
THD total harmonic distortion detuning ≤50 kHz;
MPX output voltage (RMS value) 160 200 240 mV
MPX output voltage for RDS
160 200 240 mV
(RMS value)
start of limiting voltage (RMS value) αAF= −3dB − 25 40 µV
input voltage for signal plus
noise-to-noise ratio (RMS value)
see Fig.7 for pin 47
(MPXOUT) and Fig.8 for
pin 43 (RDS/AMSTOP)
− 30 45 µV
− 70 100 µV
50 60 − dB
residual DC-offset voltage ∆L
SN+
--------------
SN+
--------------
demod
26 dB=
N
46 dB=
N
= typical value
10 µV<V
80 µV<V
AM suppression ∆f = 22.5 kHz;
f
modAM
= 1 kHz;
<80µV − 100 1000 mV
37-35
< 800 mV − 10 30 mV
37-35
mAM= 30%;
V
= 3 to 300 mV
37-35
AM suppression V
demodulator frequency control
voltage (AFC) efficiency
= 1 to 300 mV 50 60 − dB
37-35
at 100 kHz detune from
28 32 − dB
exact tuning
output resistance (pin 47) −− 3kΩ
output resistance (pin 43) −− 1.5 kΩ
AF bandwidth (pin 43) 200 −−kHz
signal plus noise-to-noise ratio 66 75 − dB
∆f = 75 kHz; f
mod
= 1 kHz
without de-emphasis;
L
= typical value
demod
pin 43;
V
37-35
− 0.1 0.35 %
= 300 µV
to 800 mV
pin 47;
V
37-35
= 1 to 800 mV
− 0.1 0.35 %
1998 Mar 24 9
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Unweighted voltage level
V
50-4
∆V
/∆V
50-4
37-35
∆V
/VK temperature dependence V
50-4
I
50(max)source
I
50(max)sink
R
o50
ADJUSTMENT OF UNWEIGHTED VOLTAGE LEVEL AND V
∆V
50
V
38-4
∆V
/∆V
50-4
38-4
R
i38
MUTING DEPENDENCE ON ADJUST OF LEVEL UNWEIGHTED VOLTAGE; note 2
V
43/V47
∆V43V47⁄
-------------------------∆V
49
unweighted voltage level see Fig.9; V38= 2.52 V
V
≤ 2.5 µV 1.6 2.2 3.0 V
37-35
V
= 1.0 mV 2.7 3.4 4.7 V
37-35
slope of unweighted voltage level 100 µV (RMS) ≤ V
37-35
< 300 mV
temperature
0.75 0.9 1.05 V/20 dB
compensation off
temperature
0.6 0.75 0.9 V/20 dB
compensation on
=1mV
37-35
temperature
− 5.0 − mV/VK
compensation off
temperature
− 2.0 − mV/VK
compensation on
maximum output source current 0.3 −−mA
maximum output sink current −50 −−µA
output resistance −− 300 Ω
mute/AML
adjusting range voltage V
; note 1
= 10 mV (RMS) −1.8 − +1.8 V
37-35
internal bias voltage − 2.6 − V
adjusting gain −−0.9 −−
input resistance − 80 − kΩ
start of mute V49/V21= 0.625 1 3 7 dB
mute slope V
= −6dB − 25 − dB/V
43/V47
Soft mute, time constant control, mono/stereo blend and high-cut control; see Fig.22
UTE VOLTAGE; note 3
M
V
∆V
49-4
49-4
/∆V
37-35
mute voltage V38= 2.52 V
V
< 2.5 µV 1.8 2.2 3.2 V
37-35
= 1.0 mV 2.7 3.4 4.7 V
V
37-35
slope of mute voltage 100 µV (RMS) ≤ V
37-35
0.75 0.9 1.05 V/20 dB
< 300 mV
/VK temperature dependency V
∆V
49-4
=1mV − 5.0 − mV/VK
37-35
1998 Mar 24 10
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
ATTACK AND DECAY TIME FOR MUTE VOLTAGE
I
ch
I
dch
∆f muting activated by 60 kHz FM
V
43/V47
T
IME CONSTANT FOR MONO/STEREO BLEND VOLTAGE; note 4
I
ch
I
dch
m mono/stereo blend activated
∆f mono/stereo blend activated
charge current pin 3 connected to GND − 3.5 −µA
pin 3 connected to pin 5 − 150 −µA
discharge current pin 3 connected to GND −−4.0 −µA
pin 3 connected to pin 5 −−170 −µA
interference
maximum mute depth by 60 kHz
FM interference
charge current V
V49<3V; V
f
= 60 kHz
mod
pin 3 connected to GND;
V
43/V47
pin 3 connected to pin 5;
V
43/V47
pin 3 connected to GND − 15 − dB
pin 3 connected to pin 5 − 10 − dB
=3mV;
37-35
37-35
=9dB
=6dB
= 3 mV;
− 40 − kHz
− 40 − kHz
− 0.6 −µA
pin 3 connected to GND
V
37-35
=3mV;
− 23 −µA
pin 3 connected to pin 5
discharge current V
37-35
=3mV;
−−17 −µA
pin 3 connected to GND
V
37-35
=3mV;
−−750 −µA
pin 3 connected to pin 5
V
by 20 kHz AM interference
R
f
16
L16
mod
<2V; V
>50MΩ;
= 20 kHz;
37-35
= 3 mV;
data byte 2 bit5=0
pin 3 connected to GND − 45 − %
pin 3 connected to pin 5 − 45 − %
data byte 2 bit5=1
pin 3 connected to GND − 55 − %
pin 3 connected to pin 5 − 55 − %
by 60 kHz FM interference
V16<2V; V
R
>50MΩ;
L16
f
= 60 kHz
mod
37-35
= 3 mV;
pin 3 connected to GND − 50 − kHz
pin 3 connected to pin 5 − 50 − kHz
1998 Mar 24 11
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
TIME CONSTANT FOR HIGH-CUT CONTROL VOLTAGE SDR; note 5
I
ch
I
dch
charge current V
discharge current V
m high-cut control activated
by 20 kHz AM interference
∆f high-cut control activated
by 60 kHz FM interference
M
ULTI-PATH DETECTOR
f
MP
multi-path detector band-pass
centre frequency
B
MP
band-pass bandwidth 7.0 −−kHz
Reference voltage
V
∆V
I
21
21-4
21-4
output voltage I21= −1 mA 4.5 5.1 5.7 V
temperature dependence − 3.3 − mV/VK
output current −− 1mA
AM-IF path; see Fig.14 and notes 6 and 7
V
22-23 max(p-p)
maximum output voltage
(peak-to-peak value)
, I
I
22
23
mixer bias current 5.0 6.0 7.0 mA
mixer leakage current in FM position −− 2 µA
I
22IF2/V27-24IF1
R
27-24
C
27-24
R
22-23
C
22-23
conversion transconductance 2.2 2.7 3.4 mS
input resistance 300 330 360 Ω
input capacitance − 58pF
output resistance 10.0 20.0 − kΩ
output capacitance − 510pF
IP3 third order intermodulation − 137 − dBµV
37-35
=3mV;
− 0.6 −µA
pin 3 connected to GND
V
37-35
=3mV;
− 41 −µA
pin 3 connected to pin 5
37-35
=3mV;
−−0.7 −µA
pin 3 connected to GND
V
37-35
=3mV;
−−44 −µA
pin 3 connected to pin 5
V
R
f
15
L15
mod
<2V; V
>50MΩ;
= 20 kHz
37-35
= 3 mV;
pin 3 connected to GND − 45 − %
pin 3 connected to pin 5 − 45 − %
V
R
f
15
L15
mod
<2V; V
>50MΩ;
= 60 kHz
37-35
= 3 mV;
pin 3 connected to GND − 50 − kHz
pin 3 connected to pin 5 − 50 − kHz
− 20 − kHz
12 15 − V
1998 Mar 24 12
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
DETECTOR; notes 8 and 9
AM
V
48-4(rms)
V
33-34(rms)
AF output level (RMS value) R
sensitivity voltage (RMS value) − 50 75 µV
AM-IF
minimum input voltage
2
(RMS value)
AM-IF
maximum input voltage
2
(RMS value)
R
33-34
C
24-23
R
o48
C
o48
SN+
-------------N
IF2 input resistance 1.8 2.0 2.2 kΩ
IF2 input capacitance − 10 15 pF
output resistance 27 33 39 kΩ
output capacitance −− 10 pF
signal plus noise-to-noise ratio 54 60 − dB
THD total harmonic distortion m = 0.8;
Notes to the characteristics
1. For typical adjusting range see Figs 10 and 13.
2. For typical curve see Fig.11.
3. The static mute voltage follows the unweighted voltage level as function of FM-IF2 voltage and level adjustment
voltage V
. It additionally depends on multi-path level, noise (adjacent channel interferences) and the position of
38-4
TSWITCH (pin 3). For typical curve for mute voltage dependence see Fig.12.
4. The mono/stereo blend voltage is generated as a function of FM-IF2 voltage, multi-path level, noise and position of
TSWITCH.
5. The high-cut control voltage is generated as a function of FM-IF2 voltage, multi-path level, noise and position of
TSWITCH.
6. f
= 10.7 MHz; f
IF1
= 450 kHz for AM mixer.
IF2
7. The AM oscillator signal is generated by division of the 61.5 MHz crystal oscillator. Two divider ratios programmable
by the I2C-bus: divide by 6 (AM-IF1= 10.7 MHz); divide by 2 (AM-IF1= 30 MHz).
8. For typical AM level curve see Fig.15.
9. For AM detector; f
AMIF2
= 450 kHz; f
= 400 Hz; m = 30%.
mod
> 500 kΩ;
L48
100 µV ≤ V
SN+
-------------N
SN+
-------------N
26 dB=
46 dB=
33-34
≤ 300 mV
190 240 290 mV
− 200 400 µV
THD ≤ 5%; m = 0.8 −− 100 µV
THD ≤ 5%; m = 0.8 800 −−mV
− 1.5 3.0 %
300 µV ≤ V
33-34
≤ 200 mV
1998 Mar 24 13
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
STEREO DECODER CHARACTERISTICS
Input signal (∆f = 75 kHz) V
(pin 45) Ri= 168 kΩ; T
MPX(p-p)
=25°C; unless otherwise specified.
amb
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
44-4(rms)
V
41-4(rms)
V
44-4
I
44(max)
V
44-4/V41-4
R
R
α
cs
SN+
--------------
o(44)
Lmin
N
; V
; R
;
41-4
; I
41(max)
o(41)
AF output voltage (RMS value) 800 900 1000 mV
DC output voltage 3.1 3.6 4.1 V
maximum output current 150 −−µA
difference of output voltage −1 − +1 dB
output resistance −−600 Ω
minimum load resistor 12 −−kΩ
channel separation (adjusted) 40 −−dB
signal plus noise-to-noise ratio f = 20 Hz to 15 kHz 74 80 − dB
THD total harmonic distortion − 0.1 0.3 %
MPX input overdrive margin THD = 1% 4 −−dB
= 1.7 V; f
= 1 kHz; de-emphasis time constant t = 50 µs; nominal input resistor
mod
Carrier and harmonic suppression at the output; note 1
α
19
α
38
α
57
α
76
α
2
α
3
α
57
α
67
pilot signal f = 19 kHz − 50 − dB
subcarrier f = 38 kHz − 50 − dB
f = 57 kHz − 50 − dB
f = 76 kHz − 60 − dB
intermodulation f
mod
f
mod
traffic radio (ARI) f = 57 kHz − 70 − dB
subsidiary communications
f = 67 kHz 70 −−dB
authorization
α
114
α
190
RR ripple rejection at output f
adjacent channel frequency f = 114 kHz − 80 − dB
f = 190 kHz − 70 − dB
= 100 Hz; Vr= 100 mV (eff.) − 30 − dB
r
Mono/stereo control
V
i(pil)
pilot threshold voltage stereo on − 24 30 mV
mono on 8 20 − mV
∆V
i(pil)
switch hysteresis V
ion/Vioff
External mono/stereo control; note 2
V
− 0.75V
17
control voltage channel separation see Fig.17
21
V
V
= 10 kHz; f
= 13 kHz; f
= 1 kHz − 60 − dB
spur
= 1 kHz − 58 − dB
spur
− 2 − dB
=6dB −−110 − mV
43/V47
=16dB −−40 − mV
43/V47
1998 Mar 24 14
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Muting functions (mute via I2C-bus)
, ∆V
∆V
44
41
α
mute
High-cut control; see Fig.18
V
− 0.75V
18
t
de-emph
Voltage controlled oscillator; note 4
f
osc
Noise blanker
DC offset voltage tune mute −50 − +50 mV
radio mute (in combination
−400 − +400 mV
with tune mute)
tune mute 60 −−dB
radio mute (in combination with
80 −−dB
tune mute)
control voltage note 3
21
t
de-emph
t
de-emph
=50µs0−−mV
=80µs −300 −−mV
control range of de-emphasis 50 − 80 µs
oscillator frequency 225 228 231 kHz
I
NTERFERENCE DETECTION FULLY INTERNAL FROM LEVEL DETECTOR
t
sup
interference suppression time 40 50 −µs
TRIGGER THRESHOLD CONTROL
I
ch
I
dch
charge current (into +4 V) − 45 −µA
discharge current (from +8.5 V) −−900 −µA
TRIGGER SENSITIVITY MEASUREMENT WITH PULSED MODULATION OF FM-IF2; see Figs 19 and 20
V
37-35(p)
V
51
∆V
51
V
37th/V37(3dB)
trigger sensitivity for test signal 1
(peak value)
trigger sensitivity for test signal 2
(peak value)
trigger threshold variation with
frequency modulation of FM-IF
and f
= 15 kHz (pin 51)
mod
shift of threshold for triggering
V38= 2.52 V; note 5 −−0.5 mV
V
= 2.52 V; note 6 100 −−mV
38
= 2.52 V; note 6 5.0 −−mV
V
38
V
= 2.52 V; note 6 100 −−mV
38
V
= 100 mV; ∆f=0kHz − 6.4 − V
37-35
2
V
= 100 mV; ∆f=40kHz − 250 − mV
37-35
I46= 0 14 20 26 dB
from MPX signal
∆V
V
46
I
offset
37th
/∆I
46
shift of threshold as function of I
46
−0.32 −0.25 −0.16 dB/µA
bias voltage (pin 46) I46< 0 4.0 4.3 4.7 V
I
> 0 5.3 5.7 6.1 V
46
gate input offset current at pins 31
− 20 50 nA
and 32 during suppression pulse
duration
1998 Mar 24 15
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